/**
 * Copyright (C) 2007 The AsyncMail Group <asyncmail@googlegroups.com>
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *         http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.googlecode.asyncmail.common;

import java.util.List;

/**
 * Handlers extends this interface to be notified of available extensions of the
 * given type.
 */
public interface ExtensibleHandler {

    /**
     * Return a List of interfaces of plugins that will extend this.
     */
    List<Class<?>> getMarkerInterfaces();

    /**
     * Method called during initialization after all the handlers have been
     * declared in the handlerchain.
     * 
     * @param interfaceName
     * @param extension
     *                a list of objects implementing the marker interface
     */
    void wireExtensions(Class<?> interfaceName, List<?> extension)
            throws WiringException;

}
